Someone did some real detective work on Reddit, coming to the conclusion that the song is likely about Adonis (funny enough, with Adonks competing for Czechia lol). The post is
Here.
It makes the lyrics so. Much. Better. To me.
In short: Adonis was the son of an incestious relationship (duh) and born from a tree ("It makes sense in context"). On Cyprus. Aphrodite found the Baby so beautiful, she brought it to Persephone into the underworld to keep an eye on him. But Adonis grew up so handsome, Persephone and Aphrodite both fell in love with him. Zeus settled the dispute by decreeing Adonis would spend half his time with Persephone, and half of it with Aphrodite.
But Adonis chose Aphrodite.
He was also a hunter, and his death was because of a wild boar. As he bled to death, Aphrodite cried, and later asked Zeus to give him immortality.
Looking at the Lyrics to "Shh":
"Golden locks, captivating, famous for my beauty" = obviously
"I've been told I'm a little over confident and this will be my downfall" = Aphrodite told Adonis to be careful when hunting, not to go after bigger/stronger animals. In one Version of the story Artemis send the boar bcs Adonis had claimed to be the best hunter alive
"Stuck inbetween heaven and hell" = he was loved by Aphrodite and Persephone, one goddess residing in the heavens, one in the underworld
"My love and my desire got me in trouble" = obviously his desire and love for Aphrodite
"I'm decay and I'm Revival" = he died and was revived a god (also, he is associated with the seasons, as each goddess got to be with him in either Winter or summer - fitting this line too)
"Grabbed by jealousy and cheated by my enemy" = would fit the most common Interpretation of his death: Ares was jealous of Adonis because of his relationship to Aphrodite, and send the boar to kill him. This sometimes involves Ares stocking Adonis bloodlust to make him attack the boar against Aphrodites request in the first place, hence cheating him
"From tears to blood to flowers" = when he died, Aphrodite cried, and she dripped his blood over the ground, which made flowers bloom in those places to remember him.
The only thing is, why the whole "don't say my name than"? Because Adonis is spending secret time with Aphrodite and does not want to be recognized?
This also does not fit the music Video, but that does not need to mean much I think. Still, this really made me like the lyrics!